8399693280 has 384 divisors, whose sum is σ = 30721420800. Its totient is φ = 1907712000.

The previous prime is 8399693279. The next prime is 8399693317. The reversal of 8399693280 is 823969938.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 8399693280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10131906 + ... + 10132734.

It is an arithmetic number, because the mean of its divisors is an integer number (80003700).

Almost surely, 2^8399693280 is an apocalyptic number.

8399693280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8399693280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15360710400).

8399693280 is an abundant number, since it is smaller than the sum of its proper divisors (22321727520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8399693280 is a wasteful number, since it uses less digits than its factorization.

8399693280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978 (or 970 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 57.

The square root of 8399693280 is about 91649.8405890594. The cubic root of 8399693280 is about 2032.7679713372.

The spelling of 8399693280 in words is "eight billion, three hundred ninety-nine million, six hundred ninety-three thousand, two hundred eighty".